JPS59139064A - Led array condenser and electronic camera using same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light concentrator for a light emitting diode (hereinafter referred to as LED) array, and is used to create a reference light punch on the surface of a photoreceptor, erase pitch on the surface of the photoreceptor, and This invention relates to a flashing rock for an array used in a 1b photographic device capable of edge erasure.

Light emitting diodes, or LEDs, are reliable at a supply price of 4L[,
LEDs generally provide a wide range of light) e
Light up the turn. However, the wide light pattern of these EDs has often prevented effective coupling of the LEDs with light conduits, waveguides, or other light transmission media.

To optically couple the seven light conduits to the seven LEDs,
It is known to press the end of a light conduit against an LED. However, since LEDs are small, 4 light tubes and LED
It has been difficult to achieve appropriate alignment. To the east, as the acceptance angle of the light conduit becomes smaller, the coupling becomes less effective.

Multiple lenses and reflective fields were used to focus and collimate the light from the widely emitting LEDs. However, when using multiple lenses and reflectors, matching is often difficult RF and therefore expensive. For example, as disclosed in U.S. Pat. I will use it. % K, a light source that emits light over a wide area is mounted adjacent to the center of the cylinder. And the spherical lens structure is connected to the light source from the pyrv
It is attached to the narrow end of the cylinder in the direction that maximizes the light layer entering the transmission line.

The difficulty with this design was that when using a %K LED array, it was necessary to match each individual LED to a structure of seven spherical lenses.

However, there is a problem in that only the light that hits the spherical lens is captured by the light conduit. Accordingly, it would be desirable to provide a relatively inexpensive, reliable, and simple fabrication means for concentrating light from an LED array at one end of the tube.

Other prior art US patents,! This patent teaches the use of an LED array as an erase lamp for dispersing portions of the photoconductive surface. Conventionally, in Yamashi photographic devices, the lighting lamps were lamps such as incandescent lamps or fluorescent lamps, and the illumination of these lamps was weakened by injecting light into the photoconductor. , this makes the light 2μ
A sharp edge of 1≦1 can be formed on the adult body due to the erased charge. In general, LEDs are used with light source guides, because their rounded backs are relatively small compared to others, such as lamps, so LEDs are used with light source guides, which emit light 2r4
It sends sufficient light to the metropolitan area. Seven optical channels are taught in US Pat. One end of this light channel is flanked by an array of individual LEDs, and a light switch is placed on the other end of the channel.
It guides light to the surface of the body. Light is emitted from the LE[), enters the light pipe, passes through the light pipe, and is transmitted to the light body while being reflected within the light pipe.

Problem 1 with conventional systems using LED arrays
1 property is not captured by the light pipe, Q', %j family light +1
” loss may occur, resulting in a decrease in optical transmission efficiency. Another difficulty lies in the fact that the light introduced into the waveguide is imperfectly or not collimated, so that the light exits the waveguide in an uncontrolled manner and discharges part of the image. I will do it.

I added an extra edition of Inu Tona Array consisting of individual EDs to ql.
Making it a 9-year-old is relatively new and has a υ1 valence. It is therefore desirable to provide an effective but simple means by which light can be transmitted from an LED array to a photoreceptor surface in a well-controlled manner.

Accordingly, it is an object of the present invention to provide a new and improved light concentrator for LED arrays. Another object of the present invention is to provide an LED array light device for use in exsanguinating selected portions of a photoconductor blush.

The purpose of the present invention is to form a hemispherical cavity around the LED and create a 1Q-shaped reflective surface on the convex lens and the frame in order to condense and direct the light emitted from the LED. An object of the present invention is to provide a condenser for LED light having the following characteristics.

Another object of the invention is to provide means for concentrating the radiation emitted from the sides of the LEo into a collimated beam.

Another important and advantageous feature of the history of the invention is the following statement.

This will become clearer as the system progresses. Further, novel features characterizing the present invention will be made particularly clear by the claims that form a part of this specification.

ν1 The only drawback is that the present invention can effectively collect and collimate the light emitted from a large number of LEDs formed as an array, and further project the light onto a glossy guide and direct the light from the guide to the photoreceptor. It is now directed toward the surface and is related to the radiator for the ED array. Radiation from LED is the main a
Each LεD is placed in the center of a hemispherical cavity within the collector array so that it essentially enters the collector without being refracted. The condenser array is provided with a convex lens portion and a parabolic reflective surface portion. Light emitted from the LED, substantially perpendicular to the LED support substrate, is applied to a convex lens and made into parallel light. Further, the light emitted substantially parallel to the base layer hits the parabolic reflecting surface at an angle of 1W, which is greater than the critical angle, and is converted into parallel light by the reflecting surface. The two concentric parallel light beams are combined and applied to the photoreceptor surface through a light conduit or gloss guide attached to a concentrator.

The objects and advantages of the present invention will become apparent upon reading the following detailed description and drawings.

Referring to FIG. 1, a typical conventional device for increasing the light output efficiency of an LED is shown. In Figure 1,
A light emitting diode or LED 20 is disposed IF at the focal point of a suitably coated reflector 22. LED
The light rays emitted from the first surface of the stick 20 are reflected by the reflector 22 and made almost parallel. However, as indicated by the arrow, the light rays emitted from the front (upward) side of the LED will not hit the reflector 22 and will therefore be scattered and dissipated. In order to use these non-reflected lights, LED2
It is known that an appropriate lens 24 is placed in front of the 0 to condense non-reflected light into parallel light. Lens 24 can collect scattered light, but unfortunately tends to scatter light that has already been collimated by reflector 22.

According to the present invention, as shown in FIG. 2, an integrally molded concentrator 26 is provided that collects and collimates the light rays emitted by the LED. In particular, LE028 is a base layer 30~
It is attached to a couplet on H. The integral concentrator 26 is preferably formed from a suitable transparent plastic material, such as styrene, acrylic, or polycarbonate. The condenser 26 has a convex lens part 32 in the center, and the lens part 32 has legs 3 concentrically surrounding it.
4 is provided. Leg portion 340. The end is ED28
It is fixed concentrically to the base layer 30.

Preferably, the base layer 30 is porcelain, either full-circle or coated with a ceramic material. A semicircular air pocket 40 separates the LED 28 from the concentrator 26.

The cavity around LED 2B will reduce the light output due to dirt and debris! The LED is mechanically removed from the foreign object and isolated. The cavity or air pocket 40 is formed using a transparent optical light (6T object rt', x K
Therefore, it should be noted that this may be achieved by matching the refractive index and increasing the output of the ED.

Another pocket 42 is formed between the leg portion 34 and the lens portion 32.

In operation, the light beam projected from the side of the LED 28 passes through the air pocket 40-, enters the end of the leg 34, is reflected by the parabolic outer surface 34a of the leg 34, and is reflected by the parabolic outer surface 34a of the leg 34-
34, it becomes a nearly parallel light beam, that is, a marimated light beam. However, the light beam emitted from the top surface of the LED 28 passes through the air pocket 40 and enters the convex lens section 32. As shown, the convex lens portion 32 refracts the light beam into parallel light legs, and converts the parallel light beam into the air pocket portion 4.
Introduced in 2.

In a preferred/embodiment, an array of multiple EDs is formed into strips for thermal dissipation on the photoreceptor. In Figure 3,
A base layer 30 is shown holding a number of LEDs 44;
The LEDs 44 on the layer are aligned with a light waveguide 46 consisting of a +Ah light conduit 48. One end of each light pipe 48
A lightwave guide 46 is affixed to the base layer 30 so as to align and lock the one or more LEDs 44 . Is it a light conduit of various widths, as if to express the A+ ability of the world?
or more LEDs may be used. For example, in the direction of the city and child photo, ψ11”t
The optical conduit can be used to erase the pitch of H (to erase the boundary between the image and the 1111) or to generate images for testing the sharpness of the image.

The final diagram details the alignment of the substrate holding the LED to the light waveguide. In this example, the LED
28 is attached to the base layer 30. Attached to the removed base layer 30 is a concentrator 26 coupled to a light waveguide 46 . Fourth, although only seven parts are shown in the figure,
It is to be understood that the condenser 26 is constructed as an integrated unit consisting of several condenser sections, each consisting of a lens section 32 and a leg section 34.

The optical recording I guide 46 is composed of a coupling portion 52, a reverse body surface 54, and a light pipe portion 48, and the outside of the light pipe portion 48 is adjacent to the surface of the photoreceptor. The light emitted from the LED 28 is twisted by the PAL sound 1X34 or D-folded by the lens section 11\32 to become an appropriately parallel light, and these concentric optical devices is reflected by the opposite 91 plane 54 and introduced into the light frame \i section 48.

The light 1 emitted from the LED sensor M1 or from the top surface of the LED is reflected by the legs 34, respectively.
Also, please note that the amount of parallel light is reduced to λ by the lens unit 32). Koi 1. Since these d rays are properly collimated, all reflections on the reflective surface 54 can be internally reflected, thus reducing the coating of the reflection '4971'Jii on the reflective surface 54. Figures 3 and 6 and 7 respectively show the CEO
＠, A plan view, an end cross-sectional view, and a cross-sectional view of the optical device array are shown in detail.

FIG. 3 shows a light layer h1 body 60 in the Shimoko photographic process, and its function will be explained below. Light, 1 guiding π body 60
Rotates in a counterclockwise direction, and first receives a uniform charge of 5 from the obijisho +f462. After displaying the image at station 64, the photoreceptor undergoes further rotation 11-11 and reaches the EO array and guide tube assembly 66.

By selectively emitting light from the LED, the light pipe can be conveniently used to release the edge portion or pitch portion of the surface of the photoreceptor, or to create a test punch for the miracle of a palm-shaped photographic device. can be used. The photoreceptor then advances to an imaging station 68 where toner is deposited onto the image and swamps the test patch, if present. The photoreceptor then advances to a transfer station 70 where the I family is transferred onto copy paper.

The usual steps of fixing the image to the copy paper and loading the copy paper onto the output tray are not shown.

In the above description, the merits of the present invention are shown, but it is not to be understood that many variations and modifications of the Sen are made by the Hanshu-Nagisa.And, It is intended to include all variations and modifications that come within the spirit and scope of the present invention within the scope of the City Permit Disclosure.

[Brief explanation of drawings]

Figure 7 is an explanatory diagram showing a typical conventional device that captures the light beam emitted from an LED, Figure HL2 is a cross-sectional view of a concentrator according to the present invention, and Figure 3 shows an ED array and separated light. Oblique diagram showing the conduit, m 4' rZl 3. Cross-sectional view showing the Ni relationship of the present invention, condenser, and 4 optical tubes. Figures 7 and 7 are a plan view, a cross-sectional end view, and a side sectional view of the LED array and light collector according to the present invention, respectively, and Figure g shows the relationship between the photoreceptor surface and the LED array and light collector.
Explanation 1 shi 1 showing the relationship. 26...Concentrator, 28...LED
. 30... Base layer, 32... Convex lens part, 34... Leg part, 44...
...LED. 46...Light wave guide, 48...Light guide tube, 60...1 light guide frost. F/6/ F/θ2 F/θ3 FI6.4

Claims (1)

[Scope of Claims] (1) A photoreceptor surface that is charged and moves in a continuous path to receive an image, and is provided along the continuous path to charge the photoreceptor surface with a relatively uniform electrostatic charge. a charge generator;
a static light mechanism that projects an image onto the surface of the photoreceptor; an imager that develops the electrostatic image by attaching a developer to the surface of the photoreceptor; Remove 1L4. In the electrophotographic apparatus equipped with a charge erasing mechanism, the charge erasing phase detection includes an LED array and an L
Ei) a condenser disposed adjacent to the array to capture the light beam emitted from the LED; one end attached to the concentrator and the other end disposed in close contact with the front He photoreceptor surface; A light wave guide, the front condenser includes a convex lens part that makes the light beam emitted from the upper surface of the LED substantially parallel;
An electrophotographic device characterized by having a parabolic reflecting portion that makes light rays emitted from the sides of the LED substantially parallel. (2. The device according to claim (1), wherein the light waveguide has several light conduits, each light guide being sensitive to a collimated light beam from a selected LED in the array. (31) An electrophotographic device characterized in that the device according to claim (2) is characterized in that each ED in the array is selectively controlled. Photographic equipment. (4) In a concentrator for collimating light rays from a light source attached to a base layer and coupling them to a light waveguide, the light rays are emitted from the light source approximately perpendicular to the base layer, emitting light over a relatively wide range. A condenser comprising a lens part that makes the emitted light beam parallel, and a reflection part that makes the light guide emitted from the light beam parallel to the base layer. (5) Claim (4) ) In the rudder shaft condenser, the lens portion is a convex lens that parallelizes the light object from the light source within a cone of about qO6 with respect to the base MK perpendicular to the condenser. Concentrator. (6145) In the condenser according to claim (-1), the reflective portion has an angle of 1130 to 1130 with respect to a line perpendicular to the base 1.
A light emitter characterized by being a parabolic reflector that parallelizes light rays emitted from a light source at an angle of 90°. A concentrator characterized in that the collimated light source 1 is combined and given to the light guide. The light source is an ED, and the condenser is a condenser that is characterized by forming a hemispherical sky 14 (tq) around the LED and substantially surrounding the ED. (9) In the concentrator of Tufts and Ships (81?'=e, there is a hemispherical sky pocket between the LED and the condenser. A concentrator that does what it does to form J.